Autopatcher.net

Small scripts: Adobe Air/Reader/Flash, Microsoft Commons, DirectX, Java, Microsoft Security, Microsoft Redistributables.
Honestly I can't create a separate forum for each of them all in the main list it would be too long.

Anyone can edit the definition files, but I don't think it's very likely. Updating programs is not that big of a problem.
The core reason for AP was always Windows where it's difficult to know what updates you need.